US: Soggy Saturday For Northeast, Scorching For Northwest & Southwest… Cooling Trend Through July!

Written by on June 27, 2015 in Summer 2015, United States of America with 0 Comments

We’ve quite the contrasts across the country today with flooding rain and 60s over Pennsylvania and western New York (70s in DC, Philly & NYC) while it’s in the 90s for Seattle and Portland, 105-110 east of the Cascades.

national_forecast

Current view from Greensburg, PA

Credit: WeatherBug

Credit: WeatherBug

Monroe, MI

Credit: WeatherBug

Credit: WeatherBug

Nashville, TN

Credit: WeatherBug

Credit: WeatherBug

Las Vegas, NV

Credit: WeatherBug

Credit: WeatherBug

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ECMWF surface chart shows the low and tropical moisture wrap-around, bringing the widespread soaking rains and subsequent coolness beneath.

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Credit: AccuWeather Pro

Credit: AccuWeather Pro

NWS forecasted HIGHS today.

MaxT1_nemetroMaxT1_pacnorthwest

Big temperature drop for the Southeast too as the associated cold front drives SE’ward, bringing showers and storms and a drop of 5-12F between yesterday and today with a marked drop in humidity too.

That drop in humidity will allow for a very comfortable night throughout the Southeast and Mid-Atlantic by late June standards.

MaxT1_midatlanticMinT1_midatlantic

Following a blistering weekend/early week for the Desert Southwest, temps eased back to the 104-108 range through the past week in both Vegas and Phoenix but those highs are back into the 110s for Vegas, 122 Death Valley.

MaxT1_pacsouthwestMaxT2_pacsouthwest

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As for the longer term (6-10 day and beyond), well the CFSv2 weakens the Pacific Northwest heat early this week and shows a westward shift in the Great Lakes into Ohio Valley trough as heights trim over the PNW. The trend is a cooling one across a broad area of the nation as we head for mid July, very fitting of a moderate to strong El Nino during the warm season.

5-day mean 500mb height anomalies day 1-15 off the CFSv2 weeklies.

Credit: Levi Cowan / Tropical Tidbits

Credit: Levi Cowan / Tropical Tidbits

Credit: Levi Cowan / Tropical Tidbits

Credit: Levi Cowan / Tropical Tidbits

Credit: Levi Cowan / Tropical Tidbits

Credit: Levi Cowan / Tropical Tidbits

5-day mean 2 metre temperature anomalies.

Credit: Levi Cowan / Tropical Tidbits

Credit: Levi Cowan / Tropical Tidbits

Credit: Levi Cowan / Tropical Tidbits

Credit: Levi Cowan / Tropical Tidbits

Credit: Levi Cowan / Tropical Tidbits

Credit: Levi Cowan / Tropical Tidbits

See today’s video for more!

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